tkittler's articles:

Items(20) /2 Next >> Last >|

Alternative solution for NAN 11 12 (2/27/2013 9:02:09 AM) comp.soft-sys.matlab The following code gives NAN (Not a Number) values [U,D]=eig(N); To solve this problem, I wrote that while(det(N) == 0) N=(1e-10.*randi(1,size(N)))*eye(size(N)); end But, the loop does not stop... Carl

Alternative solution for NAN problem 0 2 (2/27/2013 9:00:08 AM) comp.soft-sys.matlab The following code gives NAN [U,D]=eig(N); To solve this problem, I wrote that while(det(N) == 0) N=(1e-10.*randi(1,size(N)))*eye(size(N)); end But, the loop does not stop :( Are there any alte... Carl

ROC curve of target and source images 8 10 (2/25/2013 12:06:08 PM) comp.soft-sys.matlab Hi, I need matlab codes to plot a roc curve of target and source images (I have searched but the files in FileExchange are not clear (not get image files as input to give the plotted curve) for my purpos... Carl

Is gradient(I(x,y)) vector ? 1 3 (2/8/2013 4:43:08 AM) comp.soft-sys.matlab Hi When you compute the gradient of an image (8bit, grayscale), then is the result vector or scalar ? I mean that does grad(I(x,y)) return vector values or scalar values ? ... Carl

plot or mesh or ? 5 4 (1/2/2013 6:54:09 PM) comp.soft-sys.matlab Hi, I want to understand a function that has the following codes; f1 =(1/2/epsilon)*(1+cos(pi*phi1/epsilon)); b = (phi1=-epsilon); f = f1.*b; Here, phi1 is double and 256x256. The term epsilon is a con... Carl

display positive indexed pixels 3 20 (12/23/2012 9:45:08 AM) comp.soft-sys.matlab Hi, I have a grayscale image. I have some pixels that have values index: 0.329 RGB: 0.487 0.487 0.487 How can you show only these pixels ? (I do not want to display the pixels which have negative index... Carl

mpower input to eig must not contain nan or inf 7 19 (11/13/2012 12:26:13 PM) comp.soft-sys.matlab Hi, I want to compute the derivative of 10^-2*s when s0 So, I wrote this : 10^(-2*s))*log(10)*(-2) But I am getting the error : "mpower input to eig must not contain nan or inf" How can I solve t... Carl

Error: Matrix dimensions must agree #2 29 19 (10/1/2012 11:26:07 AM) comp.soft-sys.matlab Hi I would like to run this code H = laplacian(Img_smooth)-abs([Ix,Iy])*div([Ix,Iy]/abs([Ix,Iy])); But the divergence function is written as this function f = div(nx,ny) [nxx,junk]=gradient(nx); [ju... Carl

Maximum variable size allowed by the program is exceeded #4 11 41 (7/11/2012 6:51:08 PM) comp.soft-sys.matlab Hi, I am getting the strange error, and need your help My ALL images are 256x256 !!! This runs correctly; >> [x,y] = find(abs(M)> img(x,y) In this case size(x) is 764x1 but this gives the error... Carl

Equivalent codes of 2D but gives different result 0 37 (7/10/2012 8:21:07 AM) comp.soft-sys.matlab Hi, The following codes seems the same. One of them is for 2D, the other is for 3D. But their results are different. Why ? Codes For 2D are [x,y] = find(img==-11); for j=1:size(x,1) n... Ferrari

tkittler's replies:

Items(17) /2 Next >> Last >|

Alternative solution for NAN 11 12 (2/27/2013 9:02:09 AM) comp.soft-sys.matlab The following code gives NAN (Not a Number) values [U,D]=eig(N); To solve this problem, I wrote that while(det(N) == 0) N=(1e-10.*randi(1,size(N)))*eye(size(N)); end But, the loop does not stop... tkittler (90)

ROC curve of target and source images 8 10 (2/25/2013 12:06:08 PM) comp.soft-sys.matlab Hi, I need matlab codes to plot a roc curve of target and source images (I have searched but the files in FileExchange are not clear (not get image files as input to give the plotted curve) for my purpos... tkittler (90)

Dirac Delta Question 12 11 (1/17/2013 9:42:09 PM) comp.soft-sys.matlab Hey y'all, I'm very confused as to how to numerically incorporate dirac delta behaviour into my differential equation. Maybe I'm using a wrong approach? I keep getting error messages to no avail. Any advice wou... samnuzbrokh (1)

plot or mesh or ? 5 4 (1/2/2013 6:54:09 PM) comp.soft-sys.matlab Hi, I want to understand a function that has the following codes; f1 =(1/2/epsilon)*(1+cos(pi*phi1/epsilon)); b = (phi1=-epsilon); f = f1.*b; Here, phi1 is double and 256x256. The term epsilon is a con... tkittler (90)

mpower input to eig must not contain nan or inf 7 19 (11/13/2012 12:26:13 PM) comp.soft-sys.matlab Hi, I want to compute the derivative of 10^-2*s when s0 So, I wrote this : 10^(-2*s))*log(10)*(-2) But I am getting the error : "mpower input to eig must not contain nan or inf" How can I solve t... tkittler (90)

Error: Matrix dimensions must agree #2 29 19 (10/1/2012 11:26:07 AM) comp.soft-sys.matlab Hi I would like to run this code H = laplacian(Img_smooth)-abs([Ix,Iy])*div([Ix,Iy]/abs([Ix,Iy])); But the divergence function is written as this function f = div(nx,ny) [nxx,junk]=gradient(nx); [ju... tkittler (90)

Maximum variable size allowed by the program is exceeded #4 11 41 (7/11/2012 6:51:08 PM) comp.soft-sys.matlab Hi, I am getting the strange error, and need your help My ALL images are 256x256 !!! This runs correctly; >> [x,y] = find(abs(M)> img(x,y) In this case size(x) is 764x1 but this gives the error... tkittler (90)

Imwrite plotted edges after filling the holes 5 33 (3/4/2012 6:42:13 AM) comp.soft-sys.matlab Hi, I have the following codes; % construct the edge map edg = [subpix_x'/(n+1) subpix_y'/(n+1) atan2(subpix_dir_y2', subpix_dir_x2') mag_e']; [m,n] = size(edg); % plot the edgels for i=1:m, plot([edg(i... tkittler (90)

EIG must not contain NAN :( 3 126 (2/10/2012 10:29:12 AM) comp.soft-sys.matlab Hi, could you please help about the error on these codes; u=1e-10; for p=10:-1:1 B=C+u.*eye(size(C)); if det(B)==0 % ==> there is not an inverse matrix of B so u is increased by 10 u=u*10; e... tkittler (90)

convert binary to gray 7 40 (1/26/2012 6:53:22 PM) comp.soft-sys.matlab how to convert a logical binary image into same size gray image? I have tried y=bin2gray(x,'qam',16) function but here for x this function does not take the binary image directly. all I need to convert the bin... u.ingenieria.bd (11)